import numpy as np


# 与门
def AND(x1, x2):
    x = np.array([x1, x2])
    w = np.array([0.5, 0.5])
    b = -0.7

    tmp = np.sum(w * x) + b
    if tmp < 0:
        return 0
    else:
        return 1


# 主入口
if __name__ == '__main__':
    for xs in [(0, 0,), (0, 1), (1, 0), (1, 1)]:
        y = AND(xs[0], xs[1])
        print(str(xs) + ' -> ' + str(y))
